Alex Albon is suffering from appendicitis and will miss the Italian Grand Prix, Williams have confirmed.
The British-Thai racer took part in both practice sessions on Friday. But he will play no further part in the rest of the weekend's action after starting to feel unwell. In his place, Nyck de Vries is set to make his competitive debut in Formula 1, having taken part in FP1 for Aston Martin on Friday.
"Williams Racing can confirm that, after feeling unwell this morning and seeking medical advice from the FIA and local hospital, Alex Albon is now undergoing treatment for appendicitis," said the team in a statement.